Trump's elaborate combing regimen has long been the butt of jokes and speculation.

A tell-all book about Trump's White House claimed his daughter Ivanka was in the habit of describing the mechanics of the combover to friends: "An absolutely clean pate — a contained island after scalp-reduction surgery — surrounded by a furry circle of hair around the sides and front, from which all ends are drawn up to meet in the center and then swept back and secured by a stiffening spray."